English 
boat oil pressure gauge jumping
The jumping of the boat oil pressure gauge is normal. The oil pressure is the working pressure of the main oil gallery of the engine, which varies with the engine speed. When idling, the engine speed is only 300 to 1000 revolutions, and the oil pressure is generally 0.5 to 1 kg. However, as the engine speed increases, the oil pressure will increase, and the oil pressure at the highest speed can reach 5 kg/cm2. In winter, the engine oil is thick and the oil pressure will be higher. When the ship gets hot, the oil pressure will drop. The oil pressure of a new ship is generally high. When the ship is old, the oil pressure will decrease due to the increased clearance between large and small bearings (crankshaft bearings and connecting rod bearings).
If the boat oil pressure gauge jumping greatly, it may be that the throttle valve is too dirty and the fuel injection nozzle has too much carbon deposit. After driving for a certain mileage, the dirty throttle valve will cause the throttle valve to close loosely or the idling stepper motor to seize, which can cause the engine to idle too high. The carbon deposit generated during the engine's working process will also cause the vehicle to shake, especially when starting the boat , the engine will shake more severely than normal, It may even be impossible to start at once. Therefore, when the boat shakes , check the throttle and fuel injection nozzle first. If the throttle valve is found to be too dirty or the fuel injection nozzle has too much carbon, it should be cleaned in time.
When a boat engine is idling, it is most likely to cause jitter when the electrical system is turned on. The engine will increase the load due to starting the electrical system, causing the idle speed to slip. In order to compensate for the jitter caused by the idle speed slip, the engine will automatically increase the speed. Therefore, when the ship's electrical system is turned on, especially when the air conditioner is turned on in summer, the engine often shakes. If the jitter at idle speed will not drop due to the operation of the on-board air conditioning compressor, it is likely that the jitter is caused by the aging of the engine feet, which need to be replaced in time.
Get a Quote / Info